-fabnsworth



(Model.)

J. BTARNSWORTH.

COMBINATION LOOK.

No. 447,639. Patented Mar. 3, 1891.

Fbyz.

Fixx@ Aullll ipp THE ncmms v51-:ns ca muro-urna., wnsumovon, n. c

`NTTnn STATES ATnNT Trice.

JOHN E. FARNSVORTH, OF BAZlN E, KANSAS, ASSIGNOR TO FARNSVORTH &

' VILLIAMS, OF SAME PLACE.

COIVIBINATION-LOCK.

SPECIFICATION forming part of Letters Patent No. 447,639, dated March 3,1891. Application filed October 18, 1890. Serial No. 368,548. (Model.)

To @ZZ whom it may concern:

Be it known that I, JOHN E. FARNswoRTH, of Bazine, in the county of Nessand State of Kansas, have invented a new and Improved Combination-Lock,of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improvedcombination-lock which is simple and durable in construction and ropermits of a great number of changes, thus making it impossible to openthe lock without knowingr the combination.

The invention consists of a series of levers adapted to engage an'ddisengage the lockingbolt, a series of cams for actuating the saidlevers, and a train of gear-wheels for actuating the said cams atdifferent rates of speed.

The invention also consists of certain parts 2o and details andcombinations of the same, as will be fully described hereinafter, andthen pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part ofvthis specification,

in which similar letters of reference indicate corresponding parts inall the figures.

Figure l is a front view of the improvement. Fig. 2 is a like view ofthe same with the front plate of the casing removed and 3o parts insection. Fig. 3 is a transverse section of the same on the line 3 3 ofFig. 2. Fig. 4 is an enlarged sectional side elevation of the pointersand adjacent parts. Fig. 5 is a face view of a pawl-and-ratchetmechanism. Fig. 6 is a perspective view of one of the cam-wheels.

The improved combination-lock is provided with a suitably-constructedcasing A, in which is fitted to slide the locking-bolt B, provided 4o atits under side, inside of the casing, with rack-teeth B', in mesh with agear-wheel O, held on the knob-spindle D, mounted to turn in the usualmanner in the casing, and provided with an indoor knob D' and an outdoorknob D2.

At the inner. end of the locking-bolt B is secured a plate B2, adaptedto travel on top of a series of levers-E, F, and G, allfulorumed on apin A', arranged transversely in the cas- 5o ing A, and provided withshoulders on their upper sides. The under sides ofthe levers E, F, and Gare curved, as is plainly illustrated in Fig. 2, and are adapted totravel or ride on the peripheries of the cam-Wheels E', F', and G', eachof which is circular, with a 55 notch in its periphery, (see Fig. 6,)-in which notch rests the under side of the respective lever E, F, or G,so as to hold the latter in a lowermost position to permit the backplate B2 to freely travel over the levers. lVhen 6o the bolt B has beenmovedinto its outermost position by turning` either of the knobs D orD2, and one of said cams is turned so as to raise the respective leverE, F, or G, then the latter extends at its free end in front of theplate B2, so that a return movement of the bolt B is impossible.

The cam-wheel E' is mounted to turn loosely on a shaft H, extendingthrough the casing and carrying at its ends pointers H', adapted 7o toindicate on dials I and I', respectively secured or formed ou the insideand outside of the casing A. On the face of the cam-wheel E' is formedor secured a pinion E2, meshing in to a gear-wheel J, secured on ashaftJ', extend- 75 ing transversely and mounted to turn in suitable beariugsin the casing A. The gearwheel J meshes into a pinion K, provided with asleeve K', having' a square opening into which extend the knob-spindlesK2, car- 8o rying at their outer ends the indoor knob K3 and the outdoorknob K4, respectively. By turning either of the knobs K3 or K4 thepinion K is revolved, so that the latter imparts a rotary motion to thegear-wheel J, which by 8 5 meshing into the pinion E2 turns the camwheelE', so as to change the position of the lever E, riding on the saidcam-wheel. On the shaft J is secured another gear-Wheel J2, similar insize to the gear-wheel J and mesh- 9o ing into a pinion L, mounted toturn loosely .0n the shaft H and provided with a hub L', on

which is secured a pointer L2, also adapted to indicate on the innerdial I.

The cam-wheel E' is provided with a hub 95 E2, extending outward andsimilar to the hub L'. On this hub E2 is also secured a pointer L2,which indicates on the outer dial l', the two pointers L2 standing inthe samerelative position. Thus when either of the knobs KS or roo K4 isturned, the cam-wheel E' is turned, and

the pointer L2, carried by its hub E3, changes its position on the dialI, and the other pointer L2 on the hub L' ot' the pinion L moves in thesame ratio on the inner dial I, so that when the operatorceases to turneither ofthe knobs K3 or Kl the two pointers L2 stand over thecorresponding numeral on the dials I and I'. On the shaft J are alsosecured pinions J3 and J4, of the same size, and of which thepinion J3meshes into a gear-wheel F2, secured or formed on the cam-wheel F'. Thelatter is provided with a hub F3, on which is secured a pointer F4,indicating' on the outer dial I. The other pinion J" meshes into agear-wheel F3, similar in size to the gear-wheel F2 and held concentricwith the cam-wheelE'. The hub F is formed on this `rear-wheel andcarries a pointer F", which standsin the same position as the otherpointer F4, butindicates on the outer dial I'. When either of the knobsK3 or KA1 is turned, the rotary movement imparted to the shaft J', aspreviously described, causes the two pinions and .IL to turn thegear-wheels F2 and F", so that their two pointers FY1 movesin'iultaneonsly and the same distance on the inner and outer dials Iand I'. On the shaft. J' is also secured a pinion J3, which meshes intoa gearwheel N, mounted to turn loosely on the shaft Il and carrying aspring-pawl N', in mesh with a ratchet-wheel 0, secured on the shaft II,on which is also secured the cfainiviieel G', previously mentioned. Thuswhen eitherof the knobs K3 or K4 is turned in one direction the pinionJ3 is rotated and imparts a rotaly motion to the gear-wheel N, which, byits pawl N' engaging ratchet-wheel O, turns the latter, and consequentlythe shat't II,so that the pointers Il' move in the direction of thearrow a' on the dials I and I'. ,Vhen the knobs K3 or K4, however, areturned in an opposite direction, the pawl N' of the revolving gearwheelN glides over the teeth of the ratchetwheel O, and the latter, as wellas the shaft II and its pointers II', remains stationary. In order toprevent an accidental displacement oi' the shaft Il,the cam-wheel G' ispro- 'vided with a ratchet-wheel P, adapted to be engaged by a pawl P',i'ulcrumed on the pin A', as is plainlyT illustrated in Fig. 2. The pawlP' holds the ratchet-wheel P in place, thus preventing the turning` ofthe shaft H and its pointers II' when the knobs K3 and KAl are turned inthe reverse direction above mentioned. rl`he pawl I" is so arranged asto glide over the teeth of the ratchet-wheel P when the shaft H turns inthe direction of the arrow ce', above mentioned. It is understood thatthe two pointers Il' indicate over the same numerals on the dials I andI'.

The operation is as follows: lVhen the three cam-wheels E', F', and G'are in such a position that their notches stand on top, as illustratedin Fig. 2, then the levers E, F, and G are in their lowermost positionand the bolt B can be freely moved inward or outward as the bottom ofthe plate B2 travels on top of the said levers. The several pointersconfitness nee-ted with the respective Cain-wheels and their levers areadjusted in such a relative position as to indicate on the dials I andI' the respective numerals forming the combination of the lock. Asillustrated in Fig. l, the combination is l5 SO iL-that is to say, thepointers II' stand over the numerals l5 on the dials I and I' and areshifted only in the direction indicated by arrow a' when the shaft Il isturned. rlhe pointers L2 stand at lthe numerals 80 on the dials I and I'and changetheir position when either of the knobs K3 or K'l is turned ineither direction. The pointers F4 stand at the numerals 45 on the dialsI and I and are also turned when the knobs K3 and KAL are turned ineither direction. lVhen the knobs K3 and K'l are turned in the directionof arrow b', the pointers Il remain stationary, while the pointers L2and Ft move in the inverse direction ofthe arrow a', and the pointers L2at the same time move considerably faster than the pointers F4, owing tothe differential gear-wheels connecting the pointers with the pinion K,operated by the knobs K3 and K, Now when the bolt B is in the innermostposition and the operator turns either of the knobs K3 or K'l in theinverse direction of arrow 1;', then the cam-wheels E', F', and G' areturned, thus raising` the levers E, F, and G, whereby the back plate [32is engaged by the inner shoulders of the said levers and an outwardmovementof theboltB is prevented. The knobs D' and D2 cannot be turned.The turning of the knobs K3 or K'L in the direction indicated changesthe position of the pointers Il', L2, and Fi, and when the operatordesires to unlock the bolt l, so as to move it into an outermostposition, he has to turn either of the knobs first in the inversedirection of the arrow D until the pointers II' again indicate or standover the numerals l5 and the notch in cam-wheel G is on top, thusholding lever G in its lowermost position. The operator then reversesthe movement of the respective knobs K3 or Ki, so as to turn the same inthe direction of the arrow b' until the slow-moving pointer L2 is turnedto numeral 30. The notches in the cam-wheels E and F' then again standon top and the levers E and F have dropped into their lowermost positionby their own weight. The bolt B can now be moved outward by turningeither of the knobs D' or D2, and when the door is locked the operatorturns either of the knobs K3 or K'l in the inverse direction of thearrow, so as to again aetuate the camwheels E', F', and G' to swing thelevers E, F, and G upward. The outer free ends of the said levers nowabut against the back plate B2, thus preventing a return movement of thebolt B. By the turning of the knobs K3 and KAl the pointers II', F4, andL2 have changed their positions on the dials I and I'. The bolt can beunlocked by turning either of the knobs K3 or Ki, as above described,until the pointers II', F", and L2 have moved to their lOO IIO

proper positionfthat is, over the vnumerals 15, 45, and 30,respectively, on the dials I and l. The pointers and dials are coveredby glass. In order to change the combination, the operator eitherremoves the front plate or the entire lock from the door, so as to getaccess to the working parts. The cam- 'wheels are then held in placewith the notches 1n an uppermost position, and the operator now shiftsthe sets of pointers H', F4, and L2 on the shaft II and the sleeves F3and L', respectively, care being taken to move the two pointers ot' eachset to the same numeral desired to form part of the combination.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patentl. In a combination-lock, the combination, witha series of levers adapted to engage or disen gage the locking-bolt, ofa series ofcamwheels adapted to actuate the said levers, and means,substantially as described, for moving some ot' the said cam-wheels inboth directions and one only in one direction, substantially as shownand described.

2. In a coinbinatio11-lock,the combination, with a series of leversadapted to engage or disengage the locking-bolt, of a series ofcamwheels adapted to actuate the said levers, means, substantially asdescribed, for moving some of the said cam-wheels in both directions andone only in one direction, and pointers connected with the saidcam-wheels and indicating on dials, substantially as shown anddescribed.

In a combination-lock, the combination, with a series ot levers adaptedto engage or disengage the locking-bolt, ot' a series ot` camwheelsadapt-ed to actuate the said levers, means, substantially as described,for moving some of the said cam-Wheelsl in both directions and one onlyin one direction, pointers connected with the said cam-wheels andindicating on dials, and a train of gear-wheels connecting the saidcam-wheels with the said pointers to move the latter at aditferent rateof speed, substantially as shown and described.

l. In a combination-lock, the combination, with a series of leversadapted to engage or disengage the locking-bolt, of a series ofcamwheels adapted to actuate the said levers, means, substantially asdescribed, for moving some of the said cam-wheels in both directions andone only in one direction', pointers connected with the said cani-wheelsand indicating` on dials, a train of gear-wheels connecting the saidcam-wheels with the said pointers to move the latter at a different rateof speed, and a knob-spindle carrying a pinion in mesh with the saidtrain of gear-wh eels, substantially as shown and described.

5. In a combination-lock, the combination, `with a series' of leversadapted to engage or discngage the locking-bolt, of a series ot'camwheels adapted to actuate the said levers, and

a train of gear-wheels for actuating the said cams at dilierentratcsofspeed,substantially as shown and described.

6. In a combination-lock, the combination, with a series of leversadapted to engage or disengage the locking-bolt, of a series ofcamwheels adapted to actuate the said levers, a train of gear-wheels foractuating the said cams at different-rates of speed, and a knobspindleprovided with an indoor and outdoor knob and carrying a pinion in meshWith the said train of gear-wheels for actuating the lock, substantiallyas shown and described.

7. In a combination-lock, the combination, with a bolt provided With aback plate, of a series of pivoted levers provided with shoulders ontheir upper sides and upon the upper sides of which the back plate isadapted to travel, and a series of cam-Wheels for operating the saidlevers, substantially as and for the purpose set forth.

8. In a combination-lock, the combination, with a bolt provided with aback plate, of a series of levers adapted to engage the said back platein an innermost or outermost position of the said bolt to lock thelatter in place, a corresponding series of cam-wheels adapted to actuatethe said levers to engage said levers with the back plat-e or dise'ngagethem from the same, a train of gear-Wheels for actuating the saidcam-wheels at different rates of speed, and a knob-spindle carrying apinion in mesh with the said train of gear-wheels, substantially asshown and described.

9. In a combination-lock, the combination, with a bolt provided with aback plate, of a series of levers adapted to engage the said back platein an innermost or outermost position of the said bolt to lock thelatter in place, a corresponding series of cam-wheels adapted to actuatethe said levers to engage said levers with the back plate or disengagethem from the same, a train of gear-wheels for actuating the saidcam-wheels at different rates of speed, a knob-spindle carrying lapinion in mesh with the said train of gearwheels, and sets of pointersconnected with the said cam-wheels and adapted to indicate -on suitabledials, substantially as shown and described.

lO. In a combination-loclQthe combination, with a cam-wheel and a leveractuated by the said cam-wheel, of a pawl-and-ratchet mechanismconnected with the said cam-wheel, a gear- Wheel carrying the pawl ofthe said mechanism, and a train of gear-wheels in mesh with the saidgear-wheel, substantially as shown vand described.

11. In acombination-lock, the combination, withacam-wheel'and a leveractuated by the said cam-wheel, of a pawl-and-ratchet mechanismconnected with the said cam-Wheel, a gear -wheel carrying the pawl ofthe said mechanism, a train of gear-wheels in mesh with the saidgear-wheel, and a knob-spindle IOO IIO

carrying a. pinion in mesh with the said train,

of gear-wheels, substantially as shown and described.

12. In a combination-100k, the Combination,

with :L dial, of three pointers adapted t0 indiente on the said dial,and nieehzinism, suhsmntialiy as described, for turning two of the

